import java.util.Iterator;
import java.util.LinkedList;

/*
 * @lc app=leetcode.cn id=706 lang=java
 *
 * [706] 设计哈希映射
 */

// @lc code=start

class MyHashMap {
    private class Pair {
        private int key;
        private int value;

        public Pair(int key, int value) {
            this.key = key;
            this.value = value;
        }

        public int getKey() {
            return key;
        }

        public int getValue() {
            return value;
        }

        public void setValue(int value) {
            this.value = value;
        }
    }
    private int m;
    private LinkedList[] list;
    /** Initialize your data structure here. */
    public MyHashMap() {
        m = 769;
        list = new LinkedList[m];
        for (int i = 0; i < list.length; i++) {
            list[i] = new LinkedList<Pair>();
        }
    }
    
    /** value will always be non-negative. */
    public void put(int key, int value) {
        Iterator<Pair> itr=list[key%m].iterator();
        while(itr.hasNext()){
            Pair pair = itr.next();
            if(pair.getKey() == key){
                pair.setValue(value);
                return;
            }
        }
        list[key%m].addLast(new Pair(key, value));
    }
    
    /** Returns the value to which the specified key is mapped, or -1 if this map contains no mapping for the key */
    public int get(int key) {
        Iterator<Pair> itr=list[key%m].iterator();
        while(itr.hasNext()){
            Pair pair = itr.next();
            if(pair.getKey() == key){
                return pair.getValue();
            }
        }
        return -1;
    }
    
    /** Removes the mapping of the specified value key if this map contains a mapping for the key */
    public void remove(int key) {
        Iterator<Pair> itr=list[key%m].iterator();
        while(itr.hasNext()){
            Pair pair = itr.next();
            if(pair.getKey() == key){
                list[key%m].remove(pair);
                return;
            }
        }
    }
}

/**
 * Your MyHashMap object will be instantiated and called as such:
 * MyHashMap obj = new MyHashMap();
 * obj.put(key,value);
 * int param_2 = obj.get(key);
 * obj.remove(key);
 */
// @lc code=end

